Seriously, stop complaining about the cost of insurance in the UK.
Yes it's high, we all know it's high. It doesn't matter what car you have, you can still kill people - just the other day in my area 4 people were killed and a man paralysed for life after some pricks in a 106 had a head-on.
Sure you can say 'I'll never speed' or 'I always drive carefully', but insurance isn't individual is it, it's based on statistics. That's the way it is, and will be for the foreseeable future.
I know people who've had MX5s as first cars. My car was OK as a first car (Fiesta 1.6 16v), General Lee (forget your real name :schwitz
has a 316 as a first car. It's not impossible to get something OK as a first car, as long as you're prepared to shop around and then pay for it.
Anyway a couple of years on (ie when you're 21) and things become very reasonable. In fact I'm looking at a Lotus Elise as my next car (have fun while you can n all that, don't have a family to lug around etc), and insurance isn't unaffordable. It's less than it was to insure the Fiesta for the first year, put it that way.